Mold for hollow-wall construction.



No. 852,534. PATENTED MAY 7, 1907. D. O. WILSON.

MOLD FOR HOLLOW WALL CONSTRUCTION.

APPLICATION FILED MAR. 27, 1907.

3 SHEETS-SHEET 1.

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INVENTUR D. O. ZUz'Zson DID WITNESSE ATTORNEY I). 0- WILSON.

MOLD FOR HOLLOW WALL CONSTRUCTION.

' APPLIGATION FILED MAR. 21, 1907.

PATBNTED MAY 7, 1907.

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UTNESSES' INVENTOR W DOZZ/zlson ATTORNEY PATENTBD MAY 7, 1907.

D. 0. WILSON. MOLD FOR HOLLOW WALL GONSTRUGTION.

APPLICATION FILED MAR. 27, 1907.

, 3 SHEETS-SHEET 3- and useful Improvements in Molds for 1101-- Urrnn s'rarrns ra rnnr orrron.

MCDL FDR HOLLOW WALL CQNSTRUGTlN= No. seams.

, Specification of Letters Patent.

Patented. May 7, 1907.

r u aon fil d March 27,1907. Serial No. 364,837.

To all.whm it may concern."

Be it known that I, DWIGHT 0. WILSON, a citizen of the United. States, residing at Yankton, in the county of Yankton and State of South Dakota, have invented new low-Wall Construction, of which the following is a specification.

My invention relates to hollow wall construction and the object of the invention is the construction of a mold to be used in building walls of concrete and cement.

The-invention consists, in general, of a frame in which the plastic material is held until it hardens, means for supportingthe frame and means for. reinforcing and permanently strengthening the walls.

I have illustrated my invention in the accompanying drawing, in which Figure 1 is a plan View of frame and the permanent supports for the walls. Fig. 2 is a front view of Fig. 1., and Fig. 3 is a side view of the same. Fig. 4. is an enlarged plan view, showing in detail-the support for the corner of the frame and Fig. 5 is a front view of Fig. 4. Fig. 6 is a front view on line o-w Fig. 1, and Fig. 7 is the same asFig. 6, only the parts of the frame are detached. Fig. 8 is a cross-sectional view on line .ry, Fig. 7. Fig. 9 is air enlarged detail View showing a section of frame and a plan of gage used while the walls are building. Fig. 10 is a crosssection on line yz, Fig. 9. Fig. 11 is a plan of section of frame showing the gage in the position for removal. Fig. 12 is a vertical section of irame'showing the gage and. the timber used as a key for its operation. Fig.

' 13 is a'plan view of brace used to support the frame after the gage is removed and while the walls are hardening. Fig 14 is a side view of Fig. 13, and Fig. 15 is a vertical sec.- tion of the-same. Fig. 16 is an'enlarged detail View showing, partly in section, the spool-shaped device used for reinforcing the walls and seen in Figs, 1, 2 and 3.

Referring to the illustrations in which like parts are designated by similar letters of reference, A, A, are the outside walls of the frame or mold, and A, A, the inside walls. The frame is made of boards, planks or other suitable material. The plastic material is adapted to be placed between the walls A and A, forming a double wall of the concrete. The respective joints of the walls A of the frame are held together by lugs a, a, which overlap between the frames A and a bushing and squared heads 0, are inserted to hold the outer frame A in place, and they, at the same time, are used to regulate the width of the permanent walls by the length the bolt is inserted in the axis of the spool. After the walls are completed andit is desired to" remove the frame A, the hooks are released from the axes of the spools by pushing down on the strips a. v

The corners of theframe A are supported by the double braces C and C, which are bolted to the corners of the frame, telescoped together and secured by removable pins (1. The braces maintain the corners in a rigid position during the building and when the frame is removed the pins are knocked out, permitting the braces to be taken down.

In Figs. 9 to 12 is shown agage used during the process of building in keeping the central walls A from crowding together by force of the plastic material between these walls and the outer frame A. At intervals on the inside walls of each of the frames A, are secured blocks D, having central longitudinal grooves open at the ends, the openings facing in opposite directions. Wedge shaped slides E, E, are adapted to fit these grooves and are pivotally connected to a central block F by means of links d, d, and pins (1, d. The slides are pivoted to opposite corners of the block F,'Fi'g. 9, so that when they are inserted in the blocks E, E, the block F extends its longest distance between the slides. Pins 6, e, are adjusted in the block F and links to prevent the blocks from turning. The blocks F, have square central openingsjand when the permanent walls are built, a square timber G is inserted in the openings, the blocks turned as seen in 11, when the slides are removed from the blocks D, and the whole rendered free of the frames A.

In Figs. 13, 14 and 15, is shown a yoke or support for the walls to be used after the gage above described is removed and the walls are in process of hardening. The yoke consists ICC of two vertical beams H,I-I, Connected by double cross beams I, I. The yoke fits over the top of the frames. and prevents the frame A, A, from spreadingat the to In the central part of the yo ke between the frames A, a small frame is inserted, consisting of two. arallel beams 7', j, united at the bottom and at the top connected by a crosspiece I. Between the parallel beams a beam J isinserted. To the lower end of this beam, rollers I m, 'm, are pivotally connected by strips n, n, one end of the strips being pivoted to the beam, the other end to the rollers. In the strips are central slots 0, 0, and pins 1), p, are secured to each of the beams j, and project through the slots in the strips. The

beamsj overcome the inward pressure of the concrete upon the frames A. adapted to extend somewhat beyond the beams when the strips are at right angles to beam J, and by slightly raising or lowering the beam so that the strips are brought at right angles to the beam, the rollers are given an outward pressure against the frames A.

In the construction of my mold the dc Qscription here given may be variedto suit s ecial conditions, and some details may be eparted from or omitted, according to the requirements of each case.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is,

1. In a mold for hollow wall construction,

the combination of an outer frame, an inner frame jointed at intervals, having projections overlapping the joints, hooks pivotally secured to the inner frames opposite the projections and extending beyond the joints, strips pivotally secured at right angles to the hooks and extending above the frames, spoolshaped devices extending across the frames temporarily supported in said hooks and adapted to permanently reinforce the walls,

The rollers are bolts for adjustment the ends of the axes of said spools, adjustable supports for the corners of said inner frames, and removable gages at mtervals between said mner frames to resist the inward pressure of the walls, substantially as described.

2. In a mold for hollow wall construction, the combination of an outer frame, an inner frame jointed at intervals and means for se curing said joints, adjustable supports for the corners of theinner walls, with supports to resist the inward pressure of the permanent walls and consisting offblocks having longitudinal grooves secured to the innerv central block, and means for turning said block and removing said slides when the walls are completed, substantially as described. j Y

3. In a mold for hollow wall construction, the combination of an outer frame, an inner frame jointedat intervals and means for securing saidjoints, adjustable supports for the corners of said inner walls and supports at intervalsbetween said inner frames to resist the inward pressure of the permanent walls while in process of construction, with walls of said inner frames, slidesfor adjust ment to said grooves, pivotally secured to a" 

